Networks

Networks

1. Advantages

   • Share File
     • So the same files are available whatever computer you use
   • Share Logins
     • So the same username and password cam be used on every computer on the network
   • Share Resouces
     • Such as printers and network connection

2. Disadvantages

   • Increased Risk
     • Problems such as viruses can affect every computer on the network
   • Difficulty
     • Expertise is needed to set up and maintain a network

3. Type of Network

   • LAN
     • Local Area Network
       • A network in a small or a single organisation
   • WAN
     • Wide Area Network
       • A network that spans a large area or multiple organisations

4. Topologys

   • Rings
     • Advantages
       • Low chance of failure
       • No collisions
     • Disadvantages
       • Expensive
       • Depends on a switch
   • Star
     • Advantages
       • no collisions
       • Cheap to install
     • Disadvantages
       • High chance of failure
       • Difficult to expand
   • Bus
     • Advantages
       • Cheap to install
     • Disadvantages
       • High chance of failure
       • lots of collisions
       • slower when more computers are added

5. IP Addresses

   • A unique value assigned to every computer on a network used to identify it
   • Messages on a network have an IP address attached, which is how a computer knows whether not to keep the message

6. The Internet

   • The internet is a giant mesh of computers.
   • Tim Berners-Lee invted to internet